LED Light Source Mechanism, Telephone Set, and Method for Forming LED Light Source

1. An LED light source mechanism configured to use one LED (Light Emitting Diode) as a light source and illuminate an illumination surface, the illumination surface being laterally long and wide in a left/right direction, wherein, a central axis of the LED is disposed at a position on a center line vertically extending from a central part in the left-right direction of the illumination surface in such a manner that the LED faces the illumination surface, the LED light source mechanism has two reflection surfaces that are formed in a conical shape, the two reflection surfaces being configured to reflect light that is emitted from the LED toward an outside of the illumination surface, a center line of the conical shape is disposed on the central axis of the LED, the two reflection surfaces are: a first reflection surface having a conical shape and configured to reflect light from the LED on an outer-surface side thereof; and a second reflection surface having a truncated-conical shape, the second reflection surface including openings for light on both upper and lower surfaces thereof and configured to reflect light from the LED on an inner-surface side thereof, and an inner-surface side of the first reflection surface and the inner-surface side of the second reflection surface are disposed to be opposed to each other around the central axis of the LED.

2. The LED light source mechanism according to claim 1 , wherein an area at and near the central part of the illumination surface has a curved shape in which the two reflection surfaces having the conical shape are disposed at a position of an apex of the curved shape in which it is curved in the same direction from both the left and right sides in such a manner that the two reflection surfaces face the LED, and a third reflection surface having a curved shape is further formed on a curved surface on a side opposite to a side on which the two reflection surfaces having the conical shape are disposed.

3. The LED light source mechanism according to claim 2 , wherein a plurality of slits are formed between the central part of the illumination surface and both right and left ends thereof at intervals corresponding to a wavelength of light emitted from the LED.

4. A telephone set comprising a laterally long and wide horizontal incoming-call illumination panel configured to be illuminated when a telephone call is received, wherein the incoming-call illumination panel is formed by the LED light source mechanism according to claim 3 .

5. A telephone set comprising a laterally long and wide horizontal incoming-call illumination panel configured to be illuminated when a telephone call is received, wherein the incoming-call illumination panel is formed by the LED light source mechanism according to claim 2 .

6. The LED light source mechanism according to claim 1 , wherein a plurality of slits are formed between the central part of the illumination surface and both right and left ends thereof at intervals corresponding to a wavelength of light emitted from the LED.

7. A telephone set comprising a laterally long and wide horizontal incoming-call illumination panel configured to be illuminated when a telephone call is received, wherein the incoming-call illumination panel is formed by the LED light source mechanism according to claim 6 .

8. The LED light source mechanism according to claim 1 , wherein a material containing no diffusing agent for diffusing light is used for the illumination surface and a light guide part configured to guide light emitted from the LED to the illumination surface.

9. A telephone set comprising a laterally long and wide horizontal incoming-call illumination panel configured to be illuminated when a telephone call is received, wherein the incoming-call illumination panel is formed by the LED light source mechanism according to claim 8 .

10. A telephone set comprising a laterally long and wide horizontal incoming-call illumination panel configured to be illuminated when a telephone call is received, wherein the incoming-call illumination panel is formed by the LED light source mechanism according to claim 1 .

11. A method for forming an LED light source, the LED light source being configured to use one LED (Light Emitting Diode) as a light source and illuminate an illumination surface, the illumination surface being laterally long and wide in a left/right direction, wherein, a central axis of the LED is disposed at a position on a center line vertically extending from a central part in the left-right direction of the illumination surface in such a manner that the LED faces the illumination surface, the LED light source mechanism has two reflection surfaces that are formed in a conical shape, the two reflection surfaces being configured to reflect light that is emitted from the LED toward an outside of the illumination surface, a center line of the conical shape is disposed on the central axis of the LED, the two reflection surfaces are: a first reflection surface having a conical shape and configured to reflect light from the LED on an outer-surface side thereof; and a second reflection surface having a truncated-conical shape, the second reflection surface including openings for light on both upper and lower surfaces thereof and configured to reflect light from the LED on an inner-surface side thereof, and an inner-surface side of the first reflection surface and the inner-surface side of the second reflection surface are disposed to be opposed to each other around the central axis of the LED.

12. The method for forming an LED light source according to claim 11 , wherein an area at and near the central part of the illumination surface has a curved shape in which the two reflection surfaces having the conical shape are disposed at a position of an apex of the curved shape in which it is curved in the same direction from both the left and right sides in such a manner that the two reflection surfaces face the LED, and a third reflection surface having a curved shape is further formed on a curved surface on a side opposite to a side on which the two reflection surfaces having the conical shape are disposed.

13. The method for forming an LED light source according to claim 11 , wherein a plurality of slits are formed between the central part of the illumination surface and both right and left ends thereof at intervals corresponding to a wavelength of light emitted from the LED.

14. The method for forming an LED light source according to claim 12 , wherein a plurality of slits are formed between the central part of the illumination surface and both right and left ends thereof at intervals corresponding to a wavelength of light emitted from the LED.

15. The method for forming an LED light source according to claim 11 , wherein a material containing no diffusing agent for diffusing light is used for the illumination surface and a light guide part configured to guide light emitted from the LED to the illumination surface.